// Copyright 2025 RisingWave Labs
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use anyhow::anyhow;
use tokio::sync::mpsc::UnboundedReceiver;

use crate::executor::{Barrier, StreamExecutorResult};

pub(super) async fn receive_next_barrier(
    barrier_rx: &mut UnboundedReceiver<Barrier>,
) -> StreamExecutorResult<Barrier> {
    Ok(barrier_rx
        .recv()
        .await
        .ok_or_else(|| anyhow!("end of barrier receiver"))?)
}
